Prediction on hydroelastic responses of very large floating structure with the eigenfunction expansion-matching method Online publication date: Thu, 28-May-2020
by Wan Zhinan; Zhai Gangjun; Cheng Yong
International Journal of Computer Applications in Technology (IJCAT), Vol. 62, No. 4, 2020
Abstract: This paper investigates the hydroelastic responses of a mat-like, rectangular very large floating structure (VLFS) with analytical method. The VLFS is considered as a two-dimensional thick plate and the wave linearity theory is employed. The flow field is divided into three regions and the eigenfunction expansion-matching method is applied in determining the velocity potential of each region, and then the Rayleigh-Ritz method is used to solve the elastic equation of motion. The analytical method is verified by comparing with the published numerical and experimental results. The elastic deformation and wave exciting force of the VLFS are computed and the effects of water depth, wavelength, draft and stiffness on the elastic deformation of the VLFS are further discussed. The deformation increases with the increase of wavelength in general, decreases with the increase of stiffness, increases slightly with the increase of draught, and does not change significantly with the depth of water.
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